Plug puller



July 13 1926. I 1,592,347

- L. w. EVANS Pwc FULLER Filed Dec. 7. 1923 Iru/enf'or.

I Lewis WEVans M Hts Attornqy Patented July 13, 1926. I i I UNITED STATES v 1 5 2,347 PATENT oFricE.

LEWIS WILLIAM EVANS, OF PITTSFIELD MASSACHUSETTS, ASSIGNOB, TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

PLUG

PULLER.

Application filed December 7; 1923. Serial No. 679,270.

The present invention relates more especially to devices forthe safe operation of primary cutouts and commonly called plug pullers.

The potential at which electric current is distributed in cities and towns is generally regulated by municipal ordinance and varies from twenty-three hundred to forty-six hun dred volts, and in order'that it may be safely introduced into buildings, it is stepped down by transformers to one hundred and twenty-five or two hundred and fifty volts. In order that the transformers may be readily disconnected from the high potential circuit, primary cutouts are provided and these primary cutouts are generally in the form shown in the Sargent Patent No. 1,014,854, January 16, 1912, and adaptedto be manually opened by pulling out the plug thereof.

On account of the possibility of drawing a dangerous arc, especially in rainy weather,

in the breaking of the high voltage primary circuit, it has been the practice to employ a plug puller mounted at the end of a wooden pole so that the operator may remain out of the range of any electric are that may be formed while the breaking of the circuit takes place. v

The object of my invention is the provision of an improved plug puller which may be engaged with a plug with facility,

which will permit ample stress to be applied to detach the plug without injury thereto, which will prevent accidental disengagement of the freed plug thereform, and which after restoration of the plug to its operative position may be detached with facility therefrom.

One embodiment of the invention is shown in the acompanying drawing in which Fig. 1 is a front elevation of a primary cutout with my plug puller in engagement with the'plug thereof, and Fig. 2 is a perspective view of r the plug puller.

The box and the plug portions '1 andv2 of primary cutouts are customarily 7 made of porcelain and the plug is provided'with an operating handle or knob 3 and a transverse flange 4.

My plug puller 5 consists of a metal head 6 having at its outer end a transverse portion 7 provided with a key-hole slot 8 and its inner end 9 spaced therefrom and formed with a socket for mounting upon the end by pins or rivets 11.

of a woden pole 10 to which it is attached The larger portion 12 of the keyhole i slot'8 is adapted to permit the plug knob 3 to be freely entered, while the narrow portion 13 of the slot will receive only the neck 1% of the knob,jand it is so positioned that when the plug is in engagement therewith itwill beconcentric with the pole 10.

1 In order yieldinglyto retain the engage ment between the puller and the plug knob, the former is provided with a leaf spring end 9 and extending diagonally outward beneath the keyhole slot 8 so as to present an inclined surface to the plug knob 3 and tending to press the latter towards the narrow portion 13 of the slot. The spring 15 also operates to cause the plug, when freed from While I have shown and described the best embodiment of the invention known to me, I do not desire to be restricted thereto.

VVhat I claim as new and desire to secure by Letters Patent of the United States, is

1. A plug pullerhaving an outer transverse portion provided with a keyhole slot 15 is attached by bolts 16 to the inner head I adapted to engage the end of the plug and an innerportion spaced from said outer portion and provided with means for the attachment of a pole therewith in alignment with the contracted portion of said keyhole slot. 7 i

v 2. A plug puller having an outer trans verse portion provided with a keyhole slot adapted to engage the end of the plug, and an inner portion spaced fromsaid outer portion and having provision forattachment to the end: of a pole, and a leaf spring disposed between said outer and inner portions and extending diagonally outward toward said outer portion.

In witness whereof, I have hereunto set my hand this 4th day of Dec, 1923. LEWIS WILLIAlVI EVANS. 

